Cultivator spring trip



Nov. 20', 1951 T. BROWN CULTIVATOR SPRING TRIP Filed Feb. 9, 1946 INVENTOR THEOPHILUS B WN Patented Nov. 20, 1951 1 I [2,575,510. CULTIVATOR SPRING 'mlr Theophilus-.Brown,-Moline, 111.,-assignomtoDeere:

& CompannMoline, Ill., arcorporationiotlllinois;

Application-February 9, 194 sunrise-646597} The: present. invention relatesv generally. to.

agricultural implements and more particularly to agricultural machines. having groundengaging and/ or working-tools.-

The.- object and general nature. of. the present invention is theprovisionofaa new andzimproyedv spring trip device-especially adapted for tractor mounted cultivators and the. like,v in which .prm vision is made for rearward. displacement of the. ground. engagingtoolssif they should strike an obstruction, thus preventing damage to or breakage of any of the associated parts. More specifically, it-

a. feature; of; this'invention to provide a cultivator spring tripzwhichais especially compact, easy to. assemble, and economical to mediate portion of the spring bearing against one side of and lying in a notch in the shank or standard while the coils of the spring are received by and react against a transverse bar seated against the opposite side of the shank or standard.

These and other objects and advantages of the present invention will be apparent to those skilled in the art after a consideration of the following detailed description, taken in conjunction with the accompanying drawings, in which:

Figure 1 is a side view of a cultivator spring trip in which the principles of the present invention have been incorporated.

Figure 2 is a fragmentary front view of the device shown in Figure 1.

Figure 3 is a sectional view taken generally along the line 33 of Figure 1.

Figure 4 is a perspective view of the anchoring bar supporting the double coil spring which normally maintains the tool holding toggle in operative position.

Referring now to the drawings, particularly Figure 1, in order to illustrate the principles of the present invention I have shown the same as incorporated in a spring trip device for a cultivator shovel. As shown in Figure 1, the cultivator shovel is indicated by the reference nuineral I and is shown as mounted on a foot piece 2 which isipivoted at 3' on the lower: end: of: a shank. or standard 4: The: upper? end' .of: the; shank or standard i lxis clampedtathe cultivator. or other implementi by: any. suitable: means and; which'it. is; not necessary to describe here; The 1 foot piece. 2. includes a rear extension... 6;. which carries. an 1 adj ustable2pivot- 1 receivingthe-:lower: member 8- ofa. toggle ilinkaget 9; which also includes. an upper link mademp :of: aapair: ofstrapsi H 'Theupper. ends of:the;straps;.l l;are.pivoted,1. as. at l3,.to the: shankop standardz l; adejustingt screw l 5 is provided :for'setting'the togglelinks 8 and II in the desired?angularrelationto trip :at the: desired 1 overload;

A double coil spring 20 is providedlfor;yield-v ably .and; resiliently. holding. the; toggle; linkage 9 inv extended or. operative v relation. As. best shown in Figures. 2 vand. 3, the double coil spring member 20 includesspaced apart coils 2| and 22.terminating,respectively;- in ends. 23 and 24v which bear againstabutments in the. form of shouldered collars 25 and 26 which are carried by a rivet '29 that forms the pivotal connection between the toggle links 8 and II. The two coils 2| and 22 are joined by an intermediate portion of the spring indicated by the reference numeral 21. This portion 2'! of the spring 20 embraces the shank or standard 4 and seats in a notch 28 (Figure 1) so that when the spring 20 is in position the spring is prevented from slipping upwardly or downwardly along the rear edge of the shank or standard 4.

At the forward side of the shank or standard 4 there is a cross bar 31 which is formed with two rounded sections 32 and 33 for receiving the coils 2| and 22 of the spring 20. and the sections 32 and 33 are separated by a central shouldered portion 34 so that the coils of the spring 20, when they bear against the bar 3|, prevent the latter from being displaced laterally of the shank or standard 4. Also, and for the same purpose, the central portion of the bar 3| is provided with a notch 35 which seats against the forward edge 36 of the shank or standard 4, the latter serving as a, support for the tool I.

The assembly of the spring biasing means is a relatively simple matter. After the tool and toggle links are mounted on the shank, the spring 20 is brought into position with the intermediate portion 21 seated in the notch 28. Next the bar 3| is brought into position, and then with the use of suitable auxiliary tools engaging the ends '23 and 24 of the spring coils, the ends may readily be brought around the shouldered sleeves 25 and 23 and snapped into position therein. Such In operation, if the tool I (Figure 1) shouldbe subjected to an abnormai load, as by striking an.

obstruction, the toggle linkage 9 breaks upwardly, carrying the pivot 29 upwardly and to the right,

as viewed in Figure 1, moving. againststheforce exerted by the coil spring member 21L As .the H end sections 23 are displaced upwardly and rear- 4 ard-engaging portion adapted to engage one edge of said standard, and side portions, each including a coil spring section and each of said coil spring sections comprising a plurality of equal diameter turns, the laterally inward turn of which is connected to said standard-engaging portion and the laterally outermost turn of which terminates ina laterally inwardly bent portion the extremity of which is shaped to form an end lying in a plane substantially coinciding ",with the plane of the laterally inward turn of the wardly, the coils 2| and 22 are tightened and at the same time they are shifteda slight distance upwardly, this being permitted by the fact that the bar 3| slides upwardly a slight distance along the forward edge ofthestandard 4 from the position shown in Figure 1, yet the spring member 20 is held in position at. all times by the fact that the intermediate section 21 rests in the notch in the rear end of the standard or shank 4.

While I have shown and describedv above the preferred structure in which the principles of the present invention have been incorporated, it is to be understood that my invention is not to be limited to the particular details shown and described above, butthat, in fact, widely different means may be employed in the broader aspects of my invention.

What I claim, therefore, and desire to secure by Letters Patent is: v v a a a a For use in a cultivator or thelike including a standard, a tool movably connected therewith,

associated .coil section, the ends of said side portions extending substantially in parallelism,

apair .ofabutmentsj carried at opposite sides of oneof said togglelinks, said generally parallel spring ends lyingagainst the sides, respectively.

of and slidable across said abutments, the latter comprising shouldered parts arranged on said link-"with the shoulders disposed laterally outwardly thereof distanceslsufiicient to slidably receive said spring ends, respectively, and to hold said ends from becoming disengaged from said abutments in a laterally outward direction, and

a cross bar adapted to engage the other side of,

said standard and havingparallelend portions receivingsaid. coil spring sections, respectively,v

andva central shouldered. portion lying between and substantially in contact with the inward turns of said coil sections. V, w a

. ,TI-IEOPl-IILUS BROWN.

, B G 'SbnEn The following referenceslare-of record in the file of this patent: a a 

